You can choose not to put your cat in a cage when traveling by car, but please keep the following points in mind to ensure your cat's safety and comfort:
1. Safety measures: Even if the cat is not in a cage, it is necessary to ensure that it is secured in a safe place in the car to prevent it from running around. This can not only affect the driver's attention but also cause injury to the cat.
2. Comfort: Provide a comfortable environment, such as using a pet seat cushion, to ensure that the cat has a warm and safe space in the car.
3. Hygiene: Cats may urinate or defecate in the car, so you need to prepare a litter box and related cleaning supplies for easy cleaning at any time.

4. Diet: During long trips, try to avoid giving your cat too much food and water to prevent motion sickness or vomiting.
5. Observe the cat's condition: During the trip, closely observe the cat's physical and mental state. If you find that it is showing signs of anxiety, panic, or other discomfort, take measures to relieve its stress in time.
6. Veterinary advice: It is best to consult a veterinarian before traveling to understand the cat's specific condition and possible precautions.